Fluke 990DSL, Руководство пользователя

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XDSL Testing and Loop Qualification
DSL Auto-Test
5
5-7
6. Press
C
(
More
) to view subsequent Setup screens:
a) If you chose
Predefined
thresholds in step 4 above, the only
remaining Setup screen is the VF Test Selection screen, which
enables you to either include (
Y
) or exclude (
N
) the following tests:
•
VF Noise
(Metallic Noise & Power Influence)
•
VF Loss
(Single Tone, TN2000; SmartTone, TN2100 / TN2200)
•
VF Long. Balance
b) If you chose
Custom
thresholds in step 4, a third Setup screen is
displayed (in addition to the above VF Selection screen), enabling
you to enter Pass thresholds for one of the following parameters,
depending on which Service Type you selected:
•
Nyquist frequency Loss value for the chosen Service Type.
•
All Nyquist frequency Loss values for Service Type =
All
.
•
Nyquist frequency and Loss values for Service Type =
Custom
.
•
Up. & Down. Loop Attenuation values for
HDSL2
&
HDSL4
.
7. Press
M
to return to the DSL Auto-Test Selection Screen.
Running a DSL Auto-Test
After selecting the desired Setup options, do the following:
1. Connect the CopperPro tester and Terminator or Terminator Emulator
(
Far End Device
) as shown in Figure 5-1. (See Chapter 4, “Using the
CopperPro Tester as a Terminator”). Then, connect both devices to either
one or two test pairs.
2. Select either
A
(
Pair 1 Test
) or
B
(
Pair 2 Test
), then press
K
.
Note
Wideband tests (to 1.2 MHz) may be run on either the Pair 1 or Pair
2 test leads. Broadband tests (to 18 MHz) for ADSL2+ and VDSL
services must be run on only the shielded Pair 1 test leads.
The tester displays the test it is currently running.